Hmm, "Really nice looking magnetic grills"...…...
1. A statement that "I", shall never make.
2. (The form needs "must", follow the function). For them, "Grills", to be accepted, "At all", in any meaningful way.
Therefore; Those do not actually exist. Since a speakers design is for sound production/ reproduction. And any, "Grill", at least in this context. Adds nothing to the purpose of the object, "Speaker".
And further, this is not a "Subjective", situation at all.
That's my story. And I'm sticking to it!